I know my plot. I've planned it chapter by chapter, about 2,500 words per chapter. Will I be able to do it? Of course. But life might get in the way. But you can't let that stop you because it only happens but once a year.
But even if I got half of the 50,000 words written, that would be an achievement for me. So I'll see how it goes.
And to anyone to whom I said that no way was I doing this project this year - sorry! I just changed my mind, that's all!